> What about making such baffles from a moderately extensible (ie "stretchy")
material
No, stretchy is likely to be bad. It's more likely to oscillate.
or even one with SOME ability to pass fluid such that energy is dissipated in the process and/or you get damping?
Might work. Would tend to reduce the useable propellent fraction though; the propellent will tend to cling.
Such a system could (perhaps) be both lighter weight and more effective than rigid baffles. The potential for gas entrainmentn (frothing) of the fluid may need to be considered. A really sophisticated version could attempt dynamic damping,
That's usually called 'thrust vectoring' isn't it?
Russell McMahon
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